Continuous freezer



Nw. 24, 193s. A. 1.44am

v cowrImJou's Fnsznn original Filed .mma 9. 1926 5 Sheets-Sheof. 1

I f//f//ff/ d Il Nw. 24,1936. A. T LGHT CONTINUCUS FIREEZER originalFiled June 9. 192e s sheets-sunt 2 attorney Nov. 24, 1936. i A. T. LIGHTRQ 20,183

' v CONTINUOUS FR'EEZER original Filed June 9, i926 s sheen-sheet j:inventor (Ittornegs/ Reissued Nov. 24, 19236 PATENT OFFICE CONTINUOUSAlbert T. Ught. Canton. O hio, llslgnor to York I lee MachineryCorporation, York, Pa.

original No. 1,113,912, dated August zo, 1930.

Serial No. 114,672, June 9, 192B.

Application for reissue August 20, 1932, Serial No. 629.733

1s claims. (o1. tit-114) This invention relates to ice cream freezersand aims to provide a portable and self-contained freezer in which creamis continuously fed into a freezing cylinder and frozen cream iscontinuously discharged therefrom.' The freezing cylinder is stationaryadd means is provided for circulating a freezing medium about thecylinder.

A rotary shaft extends vinto the cylinder and carries a series ofrotating discs which distribute the incoming cream around the chilledwalls of the cylinder, from which it .is removed by a scraper.beatenandthrown forward toward the next disc. 'I'he semi-frozen cream isfinally deposited in a whipper cup in which a whipper carried by the-shaft whips it up toa considerable overrun. A rotary disc valveregulates the discharge of cream from the cylinder. By making thecylinder stationary it is possible to attach a drain 'to the lower partof the freezing cylinder to facilitate n Stellllzlllg. i l

While rI have discloseda preferred embodiment for purposes ofillustration it'will be clearv that various changes may be made in thestructure l without departing from the spirit and scope of the inventionas hereinafter dened and claimed.

InI the drawings;

Fig. 1 is an elevation of the machine, partly in section; v

Fig. 2 is an enlarged section through part of the discharge end of thefreezer; v

Fig. 3 is a section online 3-3 of Fig. 2;

Fig. 4 is ya section on line 4 4 of Fig. 2; v

Fig. 5 is an enlarged perspective of the whipper element;

Fig. 6 is an enlarged perspective of vthe stirring element; Y

Fig. is an enlarged end elevation of the discharge end of the cylinder;

Fig. 8 is an enlarged plan of the disc valve.

0 *Referring to` the drawings more specifically;

the frame I0, which is mounted on casters Il, carries a platform I2,and'a tub I2. A stationary freezing cylinder Il is mounted in the tuband has its receiving end closed by a plate il a having a hollow stub IC extendingthroughone 'end of tub i2. The discharge end of the cylinderisclosed by a plate i1 having a hollow tube il extending through astuffing box l! carried by the cover plate secured to the frontof the otub. Plate Il carries a drain tube 2i .extending from the bottom o f thecylinder through cover plate 2G, and'is formed with Va whipping cup 22extending inwardly. into the cylinder.

A snm yz: is jammed m une stub n ma extends through a hub 2l formed onthe whipping cup. A series of discs 2l secured to the shaft, and pairsof stirring rods 26 connect the discs, the discs being of a size toleave a spacel between their peripheries and the inside of thecylinder.' A scraper, 21 is also attached to the 5 discs and is mountedto contact with the cylinder. The shaft 2l is rotated by a chain 28connecting a motor 29 to a sprocket 30 keyed to the shaft. Cream issupplied to the cylinder from an open-top can 2|, which is fed from acream resl0 ervoir I2 through a valve 22. The rotary cream pump 24,which is operated from pulley 35 keyed to shaft 23, draws cream fromAcan 2i through pipe 26 and forces it through pipe=31 to nozzle 2B,projecting into the upper part of the cyl- 15Al inder. 1

i hopper 20 is attached to the upper side of the tub for receiving iceand salt. f When the machine is in operation the brine formed by theinteraction of theice and salt; after passing go through strainer lilextendingacross the tub near its bottom, passesv down pipe Il` to thebrine pump vI2. y This pump, which is operated from pulley 25, draws thebrine down pipe Il and forces it back through pipe l2 to the spray g5pipe 44 which distributes it in the upper part of the tub. Thisarrangement keeps the brine circulating through the tub `and helps tomaintain a uniform temperature around the cylinder Il.

As the cream issues from the nozzle 3B it is 30 sprayed against thefirst of the revolving discs which distributes it evenly around thechilled walls of the cylinder. It is then picked up by the scraper,beaten, and thrown forward, these actions being repeated until frozencream finally is tumbled into whipping cup 22. (The cream is herewhipped up to a considerable overrun and discharged in a manner now tobe described.

Thefwhipper shown in Fig. 5 rotates with shaft 40 22 inside the whippingcup, and is composed of two cross arms Il' connected by whipping rods4l'. A seat member Il having oppositely disposed sector-shaped. openingsl2' is secured in the inner'end of the hollow tube IB.A A valve disc 4,5

42,' having openings Il' corresponding to the openings in seat 4I'lssecuredto the whipper by A the projecting ends of two of the whippingrods v 'f extending into holes I linfthe valve disc.

vIn this manner the valve disc is caused to-rotate 5a with the whipper.alternately opening and closing the openings' 42'. A discharge tubeflits rotatably within the hollow tube I8 and has a spider Il securedtherein. Thespider is formed 'with two spaced' arms 48 carrying Itoffset 55 disengaged position, thereby permitting the dis-` charge tubeto remain stationary.

- the disc valve 43 will intermittently open a from the center. 'Iheparts are so designed that when the discharge tube l. is in properposition the spider 41 abuts against the end of shaft 23. `A drive boltIl, which4 is threaded into the end of the shaft, is. adapted to fitbetween the arms ll as shown in Fig. 4. The elongated head of this boltis thenrotated in a clockwise direction .until the bolt head engageswith the lugs 49, thereby causing the discharge tube 46 to rotate withshaft 2l. If desired the bolt'can be left in i It will'be clear that asthe shaft!! rotates passage from the whippins cup to the discharge tube,while the whipper rotates'towhip upthe creamand force it through thepassage. Hence when the machine is Ain operation cream is beingcontinuously fed into the cylinder through nomic 3l and frozen cream iscontinuously being delivered through the discharge tube. This continuous discharge maybe used to nllcones or other receptacles, and anyof the discharge not so interceptedI will fall into the waste can ii.

After the machine has been run continuouslyfor some time it becomesdesirable to disinfect the interior of the freezing `cylinder. (This canreadily be accomplished by forcing live steam or hot 'water into thecylinder, the plug l! being removable from the end of the drain pipe 2ito afford thorough .drainage of the cylinder.

It will be noted that the cream supply line Il has a lateral branch 56leading back toward the supply can 3| and provided with a manual controlvalve Il. Whenvalve Il is closed the entire -output of the supply Dumpis forced through nuzzle 3l into cylinder i4 and the frozen cream mustbe allowed to issue from the 'discharge tube at a corresponding rate toprevent congestion in the freezing cylinder. To operate eilciently themachine should deliver ice cream from' the discharge tube at the samerate it is being dispensed to customers. When the full discharge-is notdesired the valve 51 is partially opened. permitting part of the creamforced into line 31 by the pump. to escape back into the supply can Il.In-this manner theregulation of valve l1 controls the amountpf creamsupplied to the cylinder 'Il and as a result reduces the rate ofdischarge from the discharge tube.

A-secondary means for temporary control of the discharge is supplied inthecontrolcap 52, which is carried on a screw 5l passing through a yokeIl attached to ther tube Il.

'What is claimed is.-

.1. A continuous ice cream freezer comprising a tub, afstationarycylinder mounted in the tub, a rotatable shaft extending into thecylinder,.-

discs mounted on the shaft and means at a point removed) from theshaftfor feeding cream against one of discs.

2. A continuous ice cream freezer comprising a tub, a stationarycylinder mounted in the tub, a rotatable shaft'extending into thecylinder, a disc mounted onthe shaft, and a nome extending through thecylinder at a point removed from the shaft for feeding cream against thedisc.

" tending between the'discs. J

3. A continuous ide cream freezer comprising a tub, a stationarycylinder 'mounted in the tub,

' a rotatable shaft extending into the cylinder,

discs mounted on the shaft and beater rodsex- 4. A continuous ice creamfreezer comprising a tub, a stationary cylinder mounted in the tub, arotatable shaft extending into the cylinder,

discs mounted on the shaft, `beater rods extending between the discs,and a scraper'carried by thediscs and projecting toward the inner wallof the cylinder.

5. A continuous ice cream freezer comprising a tub, a stationarycylinder mounted in the tub, a rotatable shaft extending into thecylinder, a

whipping cup formed on one end of the cylinder4 stationary cylinder,arotary shaft in the cylinder, beating means mounted on the shaft, meansto feed cream to the cylinder, a discharge ltube on the cylinder,anapertured valve seat'mounted in the discharge tube, and a disc valverotated by the shaft to alternately open and close the apertures in thevalve seat.

7. A continuous icecream freezer comprising a stationary cylinder, arotary shaft in the cylinder, beating means mounted on `the shaft, meansto feed cream to the cylinder, a discharge tube on and a whipper keyedto the shaft within the cup.

6. A continuous ice cream freezer comprisinga the cylinder, and meansoperableto cause the discharge tube to rotate with the shaft.

8. A continuous ice cream freezer comprising',`

a tub, a stationary cylinder mounted in the tub, means for feeding creaminto the cylinder, a tube extending from the cylinder through the tub todischarge frozen cream, and a drain tube extending from the lower partof the cylinder and passing through the tub.

9. In a portable continuous ice cream freezer, a

framework `carrying a. tub, a freezing cylinder within the tub, a. creamsupply can mounted on the framework below the -cylinder, a pump forelevating cream from said supply can to the cylinder, and a source ofpower mounted on the framework for operating the pump.

. l0. A continuous ice cream freezer comprising a freezing cylinder, aline for feeding cream to the cylinder, a branch line leading from thefeed line, to permit the escape of part" of the cream passing throughthe feed line, and avalve in the branch line to control the amount ofcream escaping from the feed line.

11. A continuous ice cream freezer comp a freezing cylinder, a pump forfeeding cream to the cylinder, a feed line adapted for carrying the fullcapacity of the pump to the cylinder, and means for permitting apart ofthe cream to escape from the feed line before reaching the cylinder.

12. A continuous ice cream freezer comprising a freezingcylinder, a pumpfor feeding cr'eamto the cylinder, a feed line adapted for carrying thefull capacity. of the pump to the cylinder, 'and means for permitting acontrolled part `of the cream to escape from the feed line beforereaching the cylinder.

13. A machine for processing material, comprising a temperature-changingchamber through which the material to be processedis adapted to passcontinuously, a whipping chamber associated with said temperaturechanging chamber into which the processed material is discharged, andmeans for whipping the material therein in order to thoroughly mixparticles of different temperatures with each other.. y

14. In a continuous i cream freezer, the con- I bination-of acylindrical freezing chamber; means for refrigerating the cylindricalwall thereof;

s means for feeding cream to one end of said chamber; cream dischargingmeans leading from substantially the'ce'nter of the opposite end of saidchamber; means for. scraping the cylindrical wall of said chamber-:meansfor constraining al1 the 75 'sans creamtopass atleast onceinathinlayeralonga portion of the cylindrlcalwalll of said chamber;

and whipping means mounted within the freezing chamber in the path ofcream flowing from the last namedmeans to the cream discharging means.

j 15. In a continuous ice cream freezer, the combination of acylindrical freezing chamber; means for refrigerating the cylindricalwall thereof; means for feeding cream to one end of said chamber;` creamdischarging means leading from siii-v stantially the center of theopposite end of said chamber: means' for scraping the cylindrical wall Kof said chamber: means for constraining all thecreamtopassatleastonceinathin layeralong aportionofthecylindricalwallofsaidchamber;

a whipping cup communicatingwith'the freesing v chamber andwithsaidcreamdischargingmeans; said cup being 'surroundedvby-a of the pathof said scraping means; and 'a whipper in saidwhippingcup. l

' 16. In a continuous lee cream the combination of a cylindricalfreezing means for refrigerating substantialiy'the entire cylindricalwall thereof; means i'onfeeding cream-to one'endofsaidchamber;creamdiscliargingmeansy leading from substantialiy'thecenter of the oppositsendofsaidchainliern'otaryserapingmeanscosctingwithsubstantiailythsenreeylindricd surface of said chamber;vmeans turning with said scraping means, and constraining said cream toIiowinathinstreamagainstthecyiindricalwall' of said chamber; andwhipping means located between the last named means and said dischargingmeans. and surrounded by a portion of the i pathy of said scrapingmeans. v l

17. The method of manufacturing frozen food products which comprisesfeeding a mix substanftially continuously through successive stages oftreatment. one stage being characterised by heat abstraction to at leasta partially frosen condition, and a later stage being characterized bywhipping in the presence of a gas under approximately uniformtemper'atin'e conditions, whereby the frozen mix is' aerated'.

a is. The memoapof manufacturing :rouen food products, which comprisesfeeding a mix contin-4 munir-through successive stageain oneoi whichstagesthemixisatleastpartiallyfrosenandis subjected Vto agitation underconditionswhich cause incorporation ofpartofthetotaldesiredqimntityofainandinalateroneofwhichstsges the mix leaving-the nrst stageis'subjected to f 'whipping without substantial further reduction -oi'temperature whereby the remainder of tlie'rle-` aired gas content .isincorporated.

' v simi' 'n maar.

